So I wanted to get to the forum today to post a very minor comment about a recent comic, and, there being no forum link at the top of the page, I went up to the url bar and started typing, and realized what I wanted to do was start from https://xkcd.com/2109/ and just type into it to make https://forums.xkcd.com/2109/ to get to the thread to discuss that particular comic. I didn't really think it would work, but knowing some of the slick, subtle back-end things Randall or his minions have implemented with no fanfare, I tried it anyway.